im pretty sure its not a zaire. I am also pretty sure that it is a tanzanian. There are several types that have slightly different masks. I am thinking it is a mpimbwe, i just bought some that arrived today and doing my research the majority of the mpimbwe looked like your fish. Zaire have a different looking mask, they are just as blue, maybe bluer but as i said , the mask is bigger and covers more area. Tanzanian have narrow eye markings/masks between the eyes.